DIFF Main Group
H01J 19/00 Details of vacuum tubes of the types covered by group H01J21/00
Introduced: September 1968
Title
Titles differ between systems:
IPC: Details of vacuum tubes of the types covered by group
CPC: Details of vacuum tubes of the types covered by group H01J21/00
Full Title
Full titles differ between systems:
IPC:
Details of vacuum tubes of the types covered by group
CPC:
Details of vacuum tubes of the types covered by group H01J21/00
IPC and CPC are identically structured here. All 15 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H01J 19/42 Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies IPC+CPC Available in IPC and CPC
- H01J 19/64 Means forming part of the tube for the purpose supporting it IPC+CPC Available in IPC and CPC
- H01J 19/66 Means forming part of the tube for the purpose of providing electrical connection to it IPC+CPC Available in IPC and CPC
- H01J 19/68 Specified gas introduced into the tube at low pressure, e.g. for reducing or influencing space charge IPC+CPC Available in IPC and CPC
- H01J 19/70 Means for obtaining or maintaining the vacuum, e.g. by gettering IPC+CPC Available in IPC and CPC
- H01J 19/76 Means structurally associated with the tube for indicating defects or previous use IPC+CPC Available in IPC and CPC
- H01J 19/78 One or more circuit elements structurally associated with the tube IPC+CPC Available in IPC and CPC
- H01J 19/82 Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for IPC+CPC Available in IPC and CPC